US1434706A - Driving mechanism for vehicles - Google Patents

Description

A R. TsAND M. H. JONES.

\ DRIVING MECHANISM FOR VE'HICLES.

'APPLICATION FILED MAY 24., 192'1.

Patented Nov. 7, 1922.'

3 SHEETS-SHEET R. T. AND M. H'. JONES. DHlvlNG MEcHANlsMfoR VEHICLES.

APPLICATION FILED MAY24| l92l.

APafunted Nov. 7, 1922iY 3 SHEETS--SHEE'I 2.

il TS Hard dm Made-Zine ZT @15m R. T. AND IVI. H. JONES.

DRIVING MECHANISM vFOR VEHICLES. APPLICATloN HLED MAY 24. 1921.

Patented Nov. 7, 1922.

3 SHEETS-SHEE'I 3. i

earner anni i RICHARD T. JONES AND MADELINE HELENA JGNES, OF BALTIMORE, MARYLAND.

DRIVING MECHANISM FOR VEHICLES.

Application led May 24, 1921.

Be it known that We, RICHARD T. Jones and Mannninn HELENA Jonas, both oitieens of the United btates7 residing at Baltimore1 in the State of lilaryland` have invented certain new and useful Improvements in Driving Mechanism for Vehicles, of Which the following is a specification.

This invention relates to the driving mechanism of motor driven vehicles of the kind shown in Letters Patent of the United States No. 1,330,121 granted to us on `february 1U, 1,920. its stated. in that patent the rear wheels of motor driven vehicles are ordinarily rigidly connected to the outer rnd of a divided axle, i. c an axle made in two parts9 each of which carries at its inner end a bevelled gear meshing with a system of gears connected to the rear end of a longitudinal. shaft Which is connected with the engine by a clutch under the control of a chauffeur or driver. In such a construction 'the geariiig is at times subjected to undueI strain, often causing the gears to strip or otherwise get out of order and the tires of the Wheels to be injured. ln taking a curve one of the Wheels aften stands still or drags While the other revolves at a high speed. Furthermore in such construction lthere is often great Wear and tear on the engine from lunging forwarch coasting, etc.

lhe patent above mentioned describes means for overcoming these objectionable features.

According to our present invention We have simplified and improved `the mechanism shown in said patent.

.As in said pat/ent We employ a solid or con tinuous rear axle and the driving Wheels instead of being keyed to the axle are mounted. to turn loosely thereon. The arde driven from the engine by means of` a shaft which is connected vto the engine by a clut rh under the control of the driver and said shaft is geared permanently to the rear axle by bevelled 'which are enclosed b v a housing` .from which extend sleeves that enclose the axle. Each rear Wheel mounted loosely on one end of the axle and its hub has rigidly secured to it a flanged disk which. connects with a flange projecting .laterally from a di k on the end of the axle sleeve` This construction provides housings for that part of the mechanism which connects the Wheels with the axle.

Serial No. 472,646.

the disk carried by the adjacent ivheel hub.

The arrangement is such that ordinarily or normally the Wheels may be driven by the engine from the rear axle but should the Wheels oreither of them tend to run ahead `of the engine, then the dog or dogs will be released and the Wheel or Wheels will revolve independently of the axle. One of the eccentrics at each end of the axle is employed for driving the car forward and the other for moving it rearward, and the arrangement is such that they do not in any way interfere with each other.

In said patent each cam ring is provided with arms carrying spring pressed balls which bear aga-inst a flange or stationary disk on the adjacent end of the axle sleeve for the purpose of holding the rings steady when the cams are first moved to cause the engagement of the dogs with the flange of the hub and also to hold the cams steady other times until they are positively moved.

According to our present invention, instead of forming the rings with arms carrying spring pressed balls like those in the former patent, We employ a ring which sur rounds the cams and which is pressed against balls carried by arms Which extend radially from the cam rings. This construction has been found to be most serviceable practice. We have also provided means for preventing the loss of oil or other lubricant in the gearing and for applying a brake to the mechanism. l/Ve have also provided a new Way of limiting Jthe movement' of they cams when in operation.

ln the accompanying drawings Figure l is av plan vieiv of so much of a motor driven vehicle as is necessary to illustrato an embodiment or our inwmtion7 sonic parts being shown in section.

The remaining figures are on :in enla rgeil scale.

Figure 2 a detail view in section, showing the driving mechanism, the section being taken on the .line 2-2 of .vbignre and ivith some lof the parts broken away in .order to better show otherl parts.

Figure 3 shows a section on the line 8-3 of Figure 2.

yFigure t is a view similar to Figure 2 with the parts shiftedqv Figure 2 shows the posi-I y tion of the mechanism when driving for wards. ln Figure et the parts are in neutral position, that is, when the mechanism is not set for either driving forwardly or rearwardly.

Figure 5 shows perspective views 'of the two cams and two eccentric rings or cam rings of the kind applied to each end of the axle.

Figure G is a view similar to Figure 2 with the mechanism arranged to drive the wheel. rearward.

Figure 7 is a perspective view of the spring' pressed ring.

Figure 8 is a detail view in section. showing how the spring pressed ring operates upon the balls carried by the cam rings.

rlhe frame of the vehicle is indicated at A, andB indicates clutch mechanism of well known construction which connects the shaft C with the engine D. E indicates means for controlling` the clutch. The rear axle F is solid or continuous and is arranged in a suitable sleeve casing (i extending from a housing Gr. The shaft C is permanently connected with the rear axle by bevelled gea-rs c, c surrounded by the housing G. Each rear wheel H, l'l 'turns vfreely on the axle and is held' thereon in any suitable way. Each wheel hub has rigidly secured to its inner side a disk K having an inwardly 'extending annular flange 7c. The disk K is secured to the hub by bolts c". Preferably the inside of the flange k is formed with teeth 71:2 separated by spaces 7tas shown in Figure 2. Each end of the sleeve housing G is provided with a flange or disk L which extends radially from the axis of the shaft F and has an outwardly extending annular flange Z. The disk L is of larger diameter than the disk K and the space between the flange Z of the disk L and the flange 7c of the disk K is closed by an annular plate'P which is bolted at 7? to the Harige Z and is connected with the inner 'en d of the flange in the manner shown in Figure 3. The inner portion of the plate P is recessed at 79 and receives a packing' ring 792 which prevents lubricant from bein wasted and also prevents the entrance of dust. The exterior of the 'flange 7e' of the disk K supports a bra-ke strap lt oil usual construction and which is connected with operating mechanism fr shown in F igure l. which mechanism is operated by a lever R.

The rear axle carries n'ear each end two ecce nti-ics or cams M. M and these are keyed to the axle as indicated at m. Each of these eccentrics or cams for the most part a continuous cam surface. but each is formed with a recess m2 for a purpose hereinafter explained. Associated with each eccentric is an eccentric ring N or N formed on its inner side with a lug n extending into a recess m2 in one of thev cams. Said lng is free to move in the recess to a limited extent. From the periphery of each ring extends a dog O adapted at times to engage the interior of the flange of the disk K. Each eccentric ring N is formed with or carries an larm n. which is equipped with an antit'riction ball fn?. The arm fa, it will be observed (see Figure 8) extends inwardly from each cam ring and the hall n2 which it carries bears against the disk L. The arm fnl on the vcam ring N extends past the cani ring lIr toward the disk L.

Mounted within the space contained between the disk L and the annular plate P is a spring pressed ring S shown `in perspective in Figure 7. This ring has a radial portion s which at its outer lend is formed with an inwardly extending flange e which connects with a short radially'extending flange s2 which is perforated at s3 as indie cated in Figure 7 to receive bolts S" which rconnect the disk L with the plate l? and hold them suitable distances apart. Between the disk L and the flange s2 are interposed light coiled springs S2 which serve to press the balls n2 against the disk L and against the part s of the ring. It will, therefore7 be seen that the cam rings N. N can be moved. only against the spring pressure exerted bv the balls on the ring S and the disk L. lt will be observed that the annular plate P and the disk L are stationary. that is they do not rotate or turn while the cam rings N N do turn and the balls n2 carried by the cam rings are pressed yieldingly against the ring S and the disk L in the manner shown in Figure 8. These spring pressed balls bear at all times against the ring S and serve to prevent the eccentric rings from moving with the eccentrics or cams when the latter are first turned, i. e.. when they are moved to force the dogs O radially outward into engagement with the flanges 7c.

'At this time the lugs n move relatively to the eccentrics "in the slots n2 and the ball carrying arms a by reason of their engagement with the spring pressed ring S insure this relative movement. Otherwise the eccentric rings would turn with the eccentrics prematurely. Furthermore the ball carrying arms prevent the eccentric rings from slipping or turning relative to the eccentrics except when the latter are positively moved. (.)ther forms of springs may he used.

As before stated. when the shaft C is connected by the clutch B with the engine l). the rear axle is driven from the engine. Vhen driven forward the axle will drive the wheels H. l-l by the mechanism before described. which will then be disposed in the manner indicated in Figure 2. At this time it will be observed that the lug u is in the rear portion of the recess m2 and the dog' t.) engages the flange 7c. lVhen i n this condition the rear wheels will be driven forward laser/oo by the engine. ln Figure 2 it will be observed that only one of the dogs (l engages the langelc when driven forward, the other dog O being out et engagement therewith and being thus held by the ball carrying arm a connected with the eccentric ring which carries said dog.

In the consti-action shown, two cams and two eccentric rings are employed, and two dogs are used. to connect the cams or eccentries with. the wheel. The mechanism will remain in the condition 'shown in. Figure 2 as long as the wheels are driven. hy the engine and do not tend toturn t'aster than the axle, but should the wheels run ahead of the engine,` the dogs O which are then in engagement with the flange will be carried forward. the lugs a moving .in the recesses m2. ln d ein-g this, the ec ':en.ti.ic rings move around the eccentri and the dogs O are withd:fawn from engagement with the tlanges Z1: so that the wheels are then` tree to revolve Yfaster than the axleand no strain is placed on said axle or on the engine. ln l'ligure 4.. we have ,illustra'tiul a condition oli the mei-.lumisin when the wheels are running `toi'ward tester than the axle and it will be A observed; that there is no driving connection at this time between the axle and the wheels, both dogs being out oft engagement with the wheels.

When it is desired to more the vehicle rearward, the mechanism assumes the oondition shown in Figure 6. ln this case the inner eccentric ring .is brought. into operation and its dog O is in eng gement with the flange et the disk which drives the wheel. .lt will. be understood that the mechanism on the opposite end. ot the axle assumes the same condition at this time. The particular clutch mechanism (B) shown 'Forms no part ott our invention and the rear axle may be driven in. other wajs.

lWhile we have shown and described the invention as applied to a well. known class ot automobiles, it should be understood that it may be applied to motor driven vehicles ot various kinds.

ln the drawings '.l indicates a. Vlng extending 'from the eccentric ring N. This lug may he used suppleinen tary` to the recesses w12 and the lu o1. before referred to. hutin some cases it may he used in. place thereof. Referring lo lligureil, it `will be observed that the dog (i.) is limited it tending to move clockwise hv the adjacent arm a projecting trom the eccentric ring N and if the eccentric ring lil tends to move to too great an extent anti-clockwise, the lug T will abut against the arm a projecting from the eccentric ring N. ln this Way a certain range oit movement is given to the eccentric rings about the cams or eccentric-s, but this range ot mornament` is limited in the manner before described.

I It will be observed that instead of employing shallow teeth ou the flange l: as in the prior patent, the teeth are made deeper and Jr'ewer in number and there are spaces ll:3 between the teeth.

rlhe small `arrows on the engaging dogs O in Figures 2 and indicate the two components ot motion resulting from the rotary movement et the eccentric discs at this point. rllhe invention herein shown and described has all oft the advantages set 'l'orth in our patent of February l0, 1920 above referred to, but it also embodies some improven'ients in construction which have been fully and clearly hereinbefore set forth,

il] e claim as our invention l. 1n driving mechanism for vehicles wherein an axle is provided and wheels loosely mounted en the axleand adapted to revolve freely thereon, a clutch mecha.- nism tor connecting a wheel to the axle comprising a flanged disc attached to the wheel, a. cam attached to the axle, a ring surrounding` the cam and operated thereby, a dog carried by the ring and adapted to engage said flanged disc, a. spring-pressed ring surrounding the axle, and balls carried by ythe cam ring and engaging the springpressed ring.

2. ln driving mechanism lor vehicles wherein an axle is provided and wheels loosely mounted on the axle and adapted to revolve "freely thereon, a clutch mechanism it'or connecting a wheel to the axle comprising a stationary disc surrounding the axle, a flanged disc secured to the wheel, cams connected to the axle and revolving therewith, cam rings surrounding the cams, and provided with dogs adapted to engage the flanged disc of the wheel, means for limiting the movement of the rings on the cams, a spring pressed ring surrounding the axle, and ball-carrying arms extending from the cam rings and engaging the spring-pressed ring.

3. In drivin@- meeh'anism for vehicles wherein an axe is provided and wheels loosely mounted on the axle and adapted to revolve thereon, a clutch mechanism Jfor connecting a Wheel to the axle comprising a stationary flanged disc surrounding the axle, a flanged disc ot less diameter secured to the wheel, an annular plate interposedbetween the stationary flanged disc and the flanged disc of' the wheel, cams keyed to the 1 .f

by the stationary di 0,

axle, rings surrounding the Cams and havl nig a limited movement thereon, dogs on -statioi'iary Vflanged dise sin'roumling the axle,

a flanged dise ot smaller diameter attached to the wheel, a spring pressed ring Carried cams keyed to the the @am rings engaging the Flange of the flanged dise carried by' the Wheel, and ball Carrying arms on. the cam rings engaging the spring-lnessed ring.

5. ln driving` mechanism tor lvehicles wherein an axle is provided and Wheels loosely mounted on the axle and adapted to revolve thereon, a elnteh mechanism tor connecting Wheel to the axle comprising a stationary dise surrounding the axle, a flanged dise of smaller diameter' secured to the Wheel and provided with dog-engaging teeth, cams connected to the axle, cam rings surrounding the cams and having limited movement thereon, dogs carried by the rings and adapted to engage the teeth of the flange, ball-carrying arms extending from the rings, a spring-pressed ring With which the ball-carrying arms engage, and a lug carried by one ot the cam rings adapted to engage one or said arms.

6. A clutch mechanism for connecting a driving shaft With a driven member mounted to rotate thereon, comprising a station- 4ary 'flanged dise surrounding the driving member, a ianged dise ot lesser diameter carried by the driven member, cams keyed to the driving` member, cam rings surrounding the cams and having a limited'motion relative thereto, dogs carried byi the earn rings and movable into engagement with the vl'langed dise on the driven member, a spring-pressed -ring carried by the stationary dise, and arms on the cam rings carrying ballswhieh engage the spring-pressed ring.

7. A clutch mechanism for connecting a driving sha-ft with a driven member mounted to rotate thereon, comprising a stationary flanged dise surrounding the driving member, a flanged disc of lesser dian'ieter carried by the driven member, Cams en the driving member, cam rings carried thereby but having a limited motion relative thereto, teeth on the flanged dise carried by the driving member, dogs on the cam rings to engage said teeth, a stationary springpressed ring, and arms on the eam rings earrying balls which engage the spring-pressed ring.

ln'testimony whereof, We have hereunto subscribed our names.

RCHARD T. JONES. MADELINE HELENA JONES.

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